com.facebook.presto.spi

Interface LocalProperty<E>

All Known Implementing Classes:

ConstantProperty, GroupingProperty, SortingProperty

public interface LocalProperty<E>

Method Summary

Modifier and Type	Method and Description
default LocalProperty<E>	constrain(Set<E> columns) Return a new instance with the give (reduced) set of columns
Set<E>	getColumns()
boolean	isOrderSensitive() Returns true if reordering breaks this LocalProperty
boolean	isSimplifiedBy(LocalProperty<E> actual) Return true if the actual LocalProperty can be used to simplify this LocalProperty
<T> Optional<LocalProperty<T>>	translate(Function<E,Optional<T>> translator)
default Optional<LocalProperty<E>>	withConstants(Set<E> constants) Simplifies this LocalProperty provided that the specified inputs are constants

Method Detail

translate

<T> Optional<LocalProperty<T>> translate(Function<E,Optional<T>> translator)

isOrderSensitive

boolean isOrderSensitive()

Returns true if reordering breaks this LocalProperty

isSimplifiedBy

boolean isSimplifiedBy(LocalProperty<E> actual)

Return true if the actual LocalProperty can be used to simplify this LocalProperty

withConstants

default Optional<LocalProperty<E>> withConstants(Set<E> constants)

Simplifies this LocalProperty provided that the specified inputs are constants

constrain

default LocalProperty<E> constrain(Set<E> columns)

Return a new instance with the give (reduced) set of columns

getColumns

Set<E> getColumns()